Java Keywords

-

 In Java, a keyword is a reserved word that has a special meaning and cannot be used as an identifier (e.g., variable name, class name, method name, etc.) in the program.

Some examples of keywords in Java are:

  • class: used to define a class
  • public: used to declare a member as accessible from outside the class
  • private: used to declare a member as accessible only within the class
  • static: used to declare a member as a class-level member
  • void: used to indicate that a method does not return any value
  • if, else: used for conditional branching in the program
  • for, while: used for loop control in the program
  • new: used to create an instance of a class
  • final: used to declare a variable as a constant.

Comments

Post a Comment

Popular posts from this blog

Java Applet Overview

-
  An applet in Java is a special type of program that is designed to be executed within a web browser. Applets are written in the Java programming language and can be embedded within an HTML page using the <applet> tag. When the HTML page containing the applet is loaded in a web browser, the applet code is downloaded and executed by the Java Virtual Machine (JVM) built into the browser. Applets are often used to provide interactive functionality on a web page, such as games, animations, and data visualization. They have access to a limited set of features and resources provided by the web browser, such as user input events and graphics libraries, but are restricted from accessing resources on the user's computer or network. In recent years, the use of applets has declined in favor of other technologies such as JavaScript, HTML5, and CSS. However, applets are still supported by some web browsers and can be a useful tool in certain situations where other technologies may not be...
Read more

Applet Vs Application

-
  An applet and an application are both computer programs, but they have different characteristics and use cases. An applet is a small application that is designed to run within a larger program or environment, such as a web browser or a virtual machine. Applets are often written in languages such as Java, and they are designed to be portable and platform-independent. They typically have limited functionality and are used for specific purposes, such as displaying interactive content within a web page. On the other hand, an application is a standalone program that is designed to run on a specific operating system or platform. Applications can be written in a variety of programming languages, such as C++, Python, or Swift. They can have a wide range of functionalities, from simple text editors to complex graphics programs or video games. Applications are installed on a computer or mobile device and are run directly by the user. In summary, an applet is a small, specialized program th...
Read more

Cryptography API

-
Java offers a comprehensive set of cryptographic functionalities through its `java.security` package. This package provides various classes and interfaces for encryption, decryption, key generation, digital signatures, and more. Here are some key classes and concepts within Java's Cryptography API: 1. **Message Digests (Hashing):** Classes like `MessageDigest` help generate hash values for data using algorithms like MD5, SHA-1, SHA-256, etc. 2. **Encryption/Decryption:** The `Cipher` class allows encryption and decryption using various algorithms like AES, DES, RSA, etc. 3. **Key Management:** Java provides classes such as `KeyGenerator` for generating symmetric keys, `KeyPairGenerator` for key pairs (for asymmetric encryption), and `KeyStore` for managing keys and certificates. 4. **Digital Signatures:** The `Signature` class helps create and verify digital signatures. Here's a simple example demonstrating encryption and decryption using Java's Cryptography API: ```java im...
Read more